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LRS1061: Features: -Children develop natural sense of elapsed time.-Lets you easily program and monitor each timer via the base station.-Keep track of up to three people at once!.-Timers require one AAA battery each, not included. Base runs on AC Adapter included or three AA batteries, not included..-Ages: 4 and up. Includes: -Includes three timers with light and optional audio alarms, three second warning, and belt clips and wristbands for easy portability. Dimensions: -Overall dimensions: 4.7'' H x 7.4'' W x 11'' D.